Process of reproducing images on rubber surfaces



Patented June 3, 1930 JOHN P. BROCKWAY, OF CORONADO, CALIFORNIA rnocnss or nnrnonucme IMAGES on RUBBER SURFACES No Drawing.

My invention relates to a process of reproducing images on rubber surfaces, more particularly on surfaces composed of hard rubber, and the objects of my invention are: first, to provide a new and novel process of reproducing images; second, to provide a novel process of reproducing images by photographic process; third, to provide a new and novel process of reproducing images on rub- 10 her surfaces; fourth, to provide a processof reproducing images which provides images that are very clear and durable, and fifth, to provide a process of this class which is very simple and economical of operation and efficient in its'action.

lVith these and other objects in view as will appear hereinafter, my invention consists of the certain novel process as will be hereinafter described in detail and particularly set 20 forth in the appended claims.

My process consists in first taking hard surfaced rubber and providing it with a highly polished finish; then washing the hard surface in hydrochloric acid; then wiping-the 25 surface dry; then photographing an impression of an image from a transparent object or member, such as a film or negative placed in front of the hard rubber finished surface, by exposure to the light; then developing the 39 same on the surface by placing the hard rubber surface in a bath of nitric acid and Water of approximately fifty per centnitric acid andfifty per cent. water. This nitric acid and water will etch out the light affected por- 5 tion leaving a clear image of the object 011 the transparent member on the hard rubber surface.

I have found by experimentation that the washing of the hard surface in hydrochloric 10 acid may be omitted, but the results obtained are possibly not so satisfactory in some cases.

Though I have described a particular process of reproducing images on rubber surfaces, I do not wish to be limited to this particular as process, but desire to include in the scope of my invention the process substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Let- 5e ters Patent is:

Application filed February 28, I scrialjifo. 3 4;3,5 75.-1 I

The herein described process ofrepr'o;

ducing images on rubber surfaces, comprising providing the rubber surface with a highly polished surface, then subjecting 'thesur faceito a bath ofhydrocliloric acid, then, wip

ing said surface dry,then placing an image on a transparent member in front or said rubber surface, tlieirexposi'iig the same to light, and then developing the rubber surface by placing the same in a bath of nitric acid, fifty percent, and water, fifty percent.

2. The herein described process of repro ducing images on hard rubber finished surfaces, comprising the subjecting ofthesurface to a bath of hydrochloric acid, then wiping said surface dry, then placing a transparent member with an image thereon in front of said rubber surface, then exposing the same to light, then developing the surface by placng the same in a bath of nitric acid, fifty percent, and water, fifty percent.

The herein described process of reproducing images 011 finished hard rubber surfaces, comprising the subjecting of the surface to a bath of hydrochloric acid, then drying said surface, then placing a film with an mage thereon in front of said rubber surface and exposing the same to light, then developing the rubber surface by placing the same in a bath of nitric acid and water.

- i. The herein described process of reproducing photographic images on hard rubber finished surfaces, comprising polishing said hard rubber surface, then subjecting said polished surface to a bath of hydrochloric acid, then drying said surface, then placing a film with an image thereon in front of said rubber surface and exposing the sametolight, then developing the rubber surface by placing the same in a bath of nitric water.

acid and 5. The herein described process of reproducing photographic images on hard rubber finished surfaces, COIIIPIlSl-Ilg polishing said hard rubber surface, then subjecting said polished surface to a bath of hydrochloric acid, then drying sald surface, then plac lng a film with animage thereon in front of said rubber surface and exposing the s?ne to ight, then developing the rubber sur ace by placing the same in a bath of nitric acid, fifty percent, and water, fifty percent.

6. The herein described process of reproducing images on rubber surfaces, comprising providing the rubber surface with a highly polished surface, then placing a film with an image thereon in front of said rubber surface and exposing the same to light, then developing the rubber surface by placing the same in a bath of nitric acid and water.

7 The herein described process of reproducing images on rubber surfaces, comprising providing the rubber surface with a highly polished surface, then placing a film with an image thereon in front of said rubber surface and exposingjthe same to light, then de-' veloping the rub er surface by placing the same in a bath of nitric acid, fifty percent, and water, fifty percent.

20 In testimony whereof, I have hereunto set my hand at San Diego this 21st day of February 1929,

7 JOHN P. BROGKWAY.. 

